Collaboration, ATLAS;
(2017)
Precision measurement and interpretation of inclusive W+, W- and Z/gamma* production cross sections with the ATLAS detector.
The European Physical Journal C
, 77
, Article 367. 10.1140/epjc/s10052-017-4911-9.
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Abstract
High-precision measurements by the ATLAS Collaboration are presented of inclusive W+→ℓ+νW+→ℓ+ν , W−→ℓ−ν¯W−→ℓ−ν¯ and Z/γ∗→ℓℓZ/γ∗→ℓℓ ( ℓ=e,μℓ=e,μ ) Drell–Yan production cross sections at the LHC. The data were collected in proton–proton collisions at s√=7TeVs=7TeV with an integrated luminosity of 4.6fb−14.6fb−1 . Differential W+W+ and W−W− cross sections are measured in a lepton pseudorapidity range |ηℓ|<2.5|ηℓ|<2.5 . Differential Z/γ∗Z/γ∗ cross sections are measured as a function of the absolute dilepton rapidity, for |yℓℓ|<3.6|yℓℓ|<3.6 , for three intervals of dilepton mass, mℓℓmℓℓ , extending from 46 to 150GeV150GeV . The integrated and differential electron- and muon-channel cross sections are combined and compared to theoretical predictions using recent sets of parton distribution functions. The data, together with the final inclusive e±pe±p scattering cross-section data from H1 and ZEUS, are interpreted in a next-to-next-to-leading-order QCD analysis, and a new set of parton distribution functions, ATLAS-epWZ16, is obtained. The ratio of strange-to-light sea-quark densities in the proton is determined more accurately than in previous determinations based on collider data only, and is established to be close to unity in the sensitivity range of the data. A new measurement of the CKM matrix element |Vcs||Vcs| is also provided.
| Type: | Article |
|---|---|
| Title: | Precision measurement and interpretation of inclusive W+, W- and Z/gamma* production cross sections with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-017-4911-9 |
| Publisher version: | http://dx.doi.org/10.1140/epjc/s10052-017-4911-9 |
| Language: | English |
| Additional information: | This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| Keywords: | hep-ex, hep-ex |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1532423 |
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